Upcoming Drinking Water-Related Regulations

Regulations in Process or Planned

Other Active Projects Related to Development or Review of Regulations

  • Review of the Perchlorate Maximum Contaminant Level (MCL): The review of the perchlorate MCL has been completed to determine whether it should be revised in response to the 2015 public health goal (PHG). For a summary of the review and more about perchlorate, follow this link.
  • Microplastics: Senate Bill No. 1422 (filed on September 28, 2018) requires the State Water Board to adopt a definition of microplastics in drinking water on or before July 1, 2020, and on or before July 1, 2021, to adopt a standard testing methodology for microplastics and requirements for four years of testing and reporting, including public disclosure of results. Follow this link for more information about microplastics.
  • Unregulated Contaminants for which Monitoring is Required: DDW staff are gathering information for the development of a new unregulated contaminant monitoring regulation (UCMR) to gather comprehensive information on the scope and concentration of contaminants of concern prior to proposing drinking water standards for those contaminants.
  • MCL Review: To meet requirements of the Health and Safety Code Section 116365(g), each year the State Water Board identifies the MCLs it intends to review. Follow this link for a summary of the most recent review.
  • Direct Potable Reuse: The report to the Legislature regarding the feasibility of developing Direct Potable Reuse (DPR) criteria was submitted in December 2016. Work continues on DPR.  Follow this link for more information about Direct Potable Reuse.

Other Regulations of Interest

Upcoming Federal Rules

Other Information

Contact Information

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  (Page last updated 4/5/19)